Shortest chain of module requirements

If you want to see the chain of module that explains why a package is reachable from a module, use go mod why

package main

import (
	"database/sql"

	_ "modernc.org/sqlite"
)

func main() {
	db, err := sql.Open("sqlite", "::")
	if err != nil {
		panic(err)
	}
	_ = db.Close()
}

Here, we see that the chain that leads from the sqlite to hashicorp module.

go mod why -m github.com/hashicorp/golang-lru/v2
# github.com/hashicorp/golang-lru/v2
go1
modernc.org/sqlite
modernc.org/libc
modernc.org/libc.test
modernc.org/ccgo/v4/lib
modernc.org/ccgo/v4/lib/internal/secret_sauce
modernc.org/gc/v3
github.com/hashicorp/golang-lru/v2